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Abstract
Carbon nano-onions with hollow/shell structures were directly synthesized by a combustion synthesis process, using poly (tetrafluoroethylene) powders and ferrous chloride as raw materials. The growth of an intermediate FeF2 core template which is a dynamic-controlled process is demonstrated to be the key factor to prepare hollow carbon nano-onions. Raman spectroscopy revealed that the as-synthesized product was mainly composed of amorphous carbon. Such unique process suggests a new method for controlling the growth of an intermediate core to prepare different hollow carbon nanostructures.
Funding
The authors gratefully acknowledge the financial support of Fundamental Research Funds for the Central Universities (FRF-TP-14-008A1).